function choices()
{
//elegir el numero de banner que se desean insertar, ej: 8
this[0] = 1;

// PRIMER BANNER, Tradeboubler 0previarota cualquier tamaņo 
this[1] = '<script type="text/javascript" src="http://imp.tradedoubler.com/imp?type(js)pool(303972)a(287784)" charset="ISO-8859-1"></script>';

// PRIMER BANNER, Tradeboubler 0previarota cualquier tamaņo
this[4] = '<script type="text/javascript" src="http://imp.tradedoubler.com/imp?type(js)pool(303972)a(287784)" charset="ISO-8859-1"></script>';

// SEGUNDO BANNER, Tradeboubler 0previarota cualquier tamaņo
this[2] = '<script type="text/javascript" src="http://imp.tradedoubler.com/imp?type(js)pool(303972)a(287784)" charset="ISO-8859-1"></script>';

// SEGUNDO BANNER, Netfilia 400x400 nada
this[3] = '<script type="text/javascript" language="JavaScript" src="http://www.netfilia.com/contenidos/insert_html.html?cmf=21640&con_capa=1&contenido=400x400&web=1317&p=918334794&id=hi9DjAlh3RebE"></script>';

// SEGUNDO BANNER, Netfilia Rota 800x600 
this[5] = '<iframe name=afi800x600' + ' src="http://www.netfilia.com/contenidos/insert.html?cmf=99437&con_capa=1&contenido=800x600&web=1317&p=1399899826&id=hiZ4fLAfdLhZw&url='+escape(location.href)+'"' + ' width=800 height=600 frameBorder=no border=0 marginWidth=0 marginHeight=0 scrolling=no style="border-style:none;" >' + '</iframe>';

//si se pone arriba ej: 7 aqui aņadir this[7]=' codigo ';
}
function popUpBanner(list)
{
var today = new Date();
var choiceInstance = new choices();
var Banner = choiceInstance[(today.getSeconds() % choiceInstance[0]) + 1];
}
function grabBanner()
{
var today = new Date();
var choiceInstance = new choices();
var Banner = choiceInstance[(today.getSeconds() % choiceInstance[0]) + 1];
return Banner;
}
document.writeln(grabBanner());